Wrapping machine



Oct. 24, w B BRQNANDER WRAPPING MACHINE I Filed Dec. 12, 1941 4 Sheets-Sheet 1 ATTO RN EYS Oct. 24, 1944. w. B. BRONANDER WRAPPING MACHINE Fi led Dec. 12, 1941 4 Sheets-Sheet 2 INVENTOR fl zMe/m fiB/wzmmiv BE 5 a ATTORNEYS Oct. 24, 1944. 'w. B. BRONANDER WRAPPING MACHINE Filed Dec. 12; 1941 4 Sheets-Sheet 3 pa er 8Y2 I I i K ATTORNEYJ 0a. 24-, 1944. BRONANESER 2,360,845

WRAPPING MACHINE 4 Filed Dec. 12, 1941 4 Sheets-Sheet 4 KW M ATTORNEY) I Patented Oct. 24, 1944 mm) STATES P was FFECE This invention relates to wrapping machines and particularly to mechanism for feeding and cutting the wrapper strip and tear strip.

The invention has for its salient object to provide a machine for efiiciently and accurately feeding and cutting a wrapper strip and tear strip.

Another object of the invention is to provide a machine of the character described, so designed as to feed, cut and apply the wrapper and tear strip to the'article to be wrapped in such a manner that the tear strip can be easily grasped and will operate effectively to sever the wrapper.

Further objects of theinvention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which Fig. 1 is a vertical sectional elevation somewhat diagrammatic of the machine and mechanism constructed in accordance with the invention;

Fig. 2 is'an elevational view taken at right angles to Fig. 1 and partly in section;

Fig. 3 is a detail plan view illustrating driving connections for one of the feed" rollers, this view being taken substantially on line.3--3 of Fig. 1;

Fig. 4 is a plan view of the cutter roll and knife for severing the wrapper strip;

Fig. 5 is an enlarged sectional elevation of the cooperating rollers which function to feed the tear strip and wrapper and form a loop in the tear strip to provide an extra length thereof;

Fig. 6 is a sectional elevation illustrating the tear strip cutte in-cutting position;

Fig. 7 is a plan view of the H knife for slitting the wrapper;

r Fig. 8 is a plan view of the tear strip and wrapper after the tear strip and the slit portions of the wrapper have been pushed into the pocket of the lower roll shown in Fig. 5;

Fig. 9 is a plan view of the wrapper and tear strip before the wrapper has been cut;

Fig. 10 is a plan view of one end of the wrapper with the tear strip projecting therebeyond after the wrapper has been cut;

Fig. 11 is a plan view of the wrapper and tear strip; and

the tear strip will. be moistened or rendered adhesive and will be applied to one surface of the wrapper strip. Prior to the application of the tear strip to the wrapper strip, however, the

wrapper strip is slit longitudinally and tr'ansv versely by a H knife so as to form flaps. The tear strip is then superposed on the wrapper strip and means is provided for forming a loop therein to provide an excess of material which, after the wrapper strip has been severed, extends beyond one end of the wrapper strip. The wrapper strip with the tear strip secured thereto are fed downwardly through cutting means which cuts the wrappe strip in such a manner as to straddle" the tear strip which has been previously cut to the desired length and projects beyond one end of the wrapper strip.

Further details of the invention will appear from the following description.

In the particula embodiment of the invention illustrated, the wrapping machine is not shown, but at the bottom of Fig. 1 there is illustrated a conveyor chain zll which has thereon feeding members 2| which feedthe articles 22 to be wrapped through the machine.

The invention described and claimed in this application consists of the mechanism which feeds the wrapper and tear strip to the wrapping mechanism. As illustrated in Fig. 1, the tear strip is mounted on a roll T. From the roll T the tear strip 25 is led through a guide 26 around a feed roll 21 and downwardly between the roll 21 and a second feed roll 28. The roll 28, as shown in Figs. 1 and 2, has a portion 29 in its periphery recessed or cut out. When the tear strip is disposed between the cut-out portion 29 and the v of the rolls 2! and 28 be correctly determined and for this reason the notch or recess 29 is made of such length to as provide on the rest of the periphery of the feed roll 28 the required peripheral engagement. The roll 21 is carried by pivoted arms 30 andis held in feeding engagement with the roll 28 by means of a spring The tear strip 25 passes from the feed rolls 2'! and 28 over a heater 32 and around an idler 33 carried by a pivoted arm 34 which is actuated in an anticlockwise direction by a spring 35. From the idler 33 the tear strip passes over a wick 36' of a molstener or adhesive applying de-' vice which has a reservoir 31, conduit 38 and vertical bore 33 which the wick 36 is p0si-' toned lftlmtearstripkformedofcellophane orlikematerinaceflophanesolventisapplied tothetearstrip. l'rmthewickflthetearstrip beneathasurfaoelloftheheateril'ltwihbeseemfliereforethatthetear strip is preheatedvprior to'the application of 'theadhesiveorsolventtheremandisalsoheated after the solvent has been applied in order toevaporateanyexcasbeforethetearstripis suonthewrapperstrip.

Thewrapperstripliisledfromamp ymll W beneath an idler it and between the idler It and a knife roll ll. Theknife rollhas extending radiallyfmm theperipherythereof an Hshaped knifeshowninplanviewinlig. 7 andhavingpmlleieuttingedges l8 and I! and a.eutiingedgeilwhichatitsends intersectstheknifeedgesllandfl. Theknife justdthusformsflapsii andflinthe wrapperstripittheflapsbeingformedinsuch -a"position that the tear strip when superimpwed 'isterwiththepocketlfi'thusastheW.

stripliandthetearstripiinaasbetweenthe orpiniiwillforcethe flcan'iedbyaroliiimountedonashaftll.

Fig. Gilluslratesthekniieincutflngt .withthetearstripinbackoftheloopformedv wrapper.

the driving and the various feed mils and cutters will now be hrieflydescribed.

The main driving shaft shown at in Fig. 1 has mounted thereon a gear 8! which meshes with agear 82 carried by the shaft 83 on which the cutter 12 is moimted. Shaft 83 has also secured thereto a gear 85 which meshes with a gear 8 carried by an idler shaft 81. Gear 86 also meshes with a gear llmounted on a shaft 8! which carries the feed roll H. Shaft 89 has also secured thereto a gear 90 which meshes with a gear ll carried by a-shaft 92 which in turn carris the feed roll Ill. The shaft 92 has eccentric ends 93 and is adapted to swing toward or away from the shaft 89 on the eccen- 'tric end portions thereof. However, in order to resiliently hold the roll Ill in feeding engagement with the roll ll one end of the shaft has an arm 84 secured thereto which is engaged byaspring ",thespring acfingtoswingthe shaftlltowardtheshaft.

Thegearfllontheshaftllmeshes witha sear ll on anidler shaft 81. Gear 96 in turn meshes with a gear 08 on a shaft 98 on which therolliiis mounted. Gear intummeshes with a gear Ill carried by'the shaft 68 of the knife I6. Gea.r Ill meshes with a gear ll! mounted on the shaft It. Gear I02 drives a Bear Ill mounted on a shaft II which carries therolll'l.

Fk o ntheshowhiginfig.-3itwil1benotedthat the gear II! is awide gear and meshes not only with the gear Ill on shaft IM, butwith a gear 7 on which the shaft ill is mounted are pivoted ontheaxisoftheshaftil andsincethegear M3 on the shaft I meshes with gear I02 on shaft II, when the arms are swung upwardly to permit the tear strip and web or wrapper strip to be. threaded through the machine and between therollsliandiltherollilwilibecontrolled by the intermeshing gears, thus preventing the studorpinflfrombeingsorotatedastothrow From the foregoing specification it'wiil be seen thatthetearstripandwrapperstripwillbe accurately fed andcutand that by reason of the 'loopformedinthetearstripanextralengthof tear strip is provided so that after the wrapper hasbeencutan'endofthetearstripwillprojectbeyond an end of the wrapper, as shown particularly in Fig. 11. Furthermore, by providing slits inthewrapperparalieltothetearstrlpandat theendsofthewrapperthetearingorsevering' gthewrapperbythepullonthestrlpisfacilited the construction and in the arrangement of the various cooperating partsmay be made without departing from the spirit and scope of the inventlomasinthefollowingclaims.

WhatIclaimis: L'In a machine of the character described,

meansforcuttingatransverseslitinawrapper riphery, means for bending the tear strip and adjacent parts of the wrapper strip into said pocket, and means for cutting the tear strip and wrapper strip transversely.

'2. In a machine of the character described, means for cutting spaced longitudinal slits and an interconnecting transverse slit in a wrapper strip, means for superimposing a tear strip longitudinally on the wrapper strip across said transverse slit, a feed roll having a transverse pocket in its periphery, means for bending the tear strip and adiacent parts of the wrapper strip into said pocket, and means for cutting the tear strip and wrapper strip transversely. I

3. In a machine of the character described, means for cutting a transverse slit in a wrapper strip, means for superimposing a tear strip 1ongitudinally on the wrapper strip across saidslit,

a feed roll having a transverse pocket in its pe- 20 transverse slits, a feed roll having a transverse riphery, means for bending the tear strip and adjacent parts of the wrapper strip into said pocket to form .a loop in the tear strip, means for severing the tear strip back of said loop, and

other means for severing the wrapper strip trans-' versely from the longitudinal slits therein to its edges.

4. In a machine of the character described, means for cutting a transverse slit in a wrapper pocket to form a loop in the tear strip. means for severing the tear strip back of said loop, and a knife for severing the wrapper transversely from the longitudinal slits therein to its edges, said knife having a gap therein to straddle the tear strip.

5. In a machine of the character described, means for feeding a wrapper strip means for making an H cut in said strip with two cuts parallel to the longitudinal edges of the strip and the connecting cut transverse to the strip, means for auperposing a tear strip on the wrapper strip between the parallel cuts, and means for forming 1 a loop in the tear strip opposite the cuts in the wrapper strip. 6. In a machine of the character described,

5 means for feeding a wrapper strip, means for between the parallel cuts, means for forming a 'loop in the tear strip, and means for cutting the .tear strip in back of the loop in the direction of feed of the tear strip opposite the cuts therein.

7. In a machine of the character described,

1 means for cutting spaced longitudinal slits and interconnecting transverse slits in a wrapper strip at longitudinally spaced intervals, means for superimposing a tear strip on the wrapper strip between the longitudinal slits and across the pocket in its periphery, means for bending the tear strip and adjacent parts of the wrapper strip into said pockets to form loops in the tear strip, means for severing the tear strip back of said loops and other means for severing the wrapper strip transversely on lines longitudinally spaced from the severed ends of the tear strip from the longitudinal slits therein to its edges.

-8. In a machine of the character described.

means for cutting spaced longitudinal slits and interconnecting transverse slits in a wrapper strip at longitudinally spaced intervals, means for superimposing a tear strip on the wrapper strip between the longitudinal slits and across the transverse slits, means for conditioning the tear strip to adhere to the wrapper strip, a feed roll having a transverse pocket in its periphery, means for bending the tear strip and adjacent parts of the wrapper strip into said pocket to form loops in the tear strip, means for severing the tear strip back 01' said loops, and a knife for severing the wrapper transversely from the iongitudinal slits'therein to its edges, said knife having a gap therein to straddle the tear strip.

WIIHELM B. BRONANDER. 

